My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SM15T27A-M3/57T
- Part No.:
- SM15T27A-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T27A-M3/57T.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,826
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SM15T27A-M3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in SMC (DO-214AB) package, featuring 27 V standoff voltage (VWM = 23.1 V), 37.5 V clamping voltage at 40 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 μs waveform. It protects MOSFETs, ICs, and sensor signal lines in automotive and industrial motor-control systems against lightning-induced and switching transients.
For engineers reviewing the SM15T27A-M3/57T datasheet, SM15T27A-M3/57T pinout, SM15T27A-M3/57T application, or SM15T27A-M3/57T equivalent, key selection criteria include clamping performance at rated IPPM, unidirectional polarity with cathode band marking, halogen-free RoHS compliance (M3 suffix), and thermal resistance (RθJA = 75 °C/W) under standard pad layout.
Technical Context
The SM15T27A-M3/57T uses a glass-passivated silicon junction to achieve low clamping ratio (VC/VBR ≈ 1.33) and low dynamic impedance. Its failure mode under overstress is short-circuit, ensuring system-level fault containment in safety-critical protection paths.
Designed for high-source-impedance transient environments, it operates within -65 °C to +150 °C junction temperature range and meets J-STD-020 MSL Level 1 with 260 °C reflow peak. The device is not AEC-Q101 qualified (lacks HE3/HM3 suffix), confirming commercial-grade use only.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 23.1 V - Maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 25.7–28.4 V at 1 mA - Confirmed avalanche initiation range; ensures reliable turn-on during transients |
| VC (Clamping Voltage) | 37.5 V at 40 A (10/1000 μs) - Limits downstream voltage stress to safe levels for 24 V rail components |
| PPPM (Peak Pulse Power) | 1500 W - Sustains single-event lightning surges per IEC 61000-4-5 without degradation |
| RθJA | 75 °C/W - Requires minimum 8.0 mm × 8.0 mm copper pads per terminal for thermal derating compliance |
| Polarity & Marking | Unidirectional with cathode band - Enables correct orientation in DC-biased protection circuits |
| Compliance | Halogen-free, RoHS-compliant (M3 suffix); MSL Level 1, 260 °C peak reflow - Supports lead-free manufacturing |
Pinout & Package
Package: SMC (DO-214AB), molded in UL 94 V-0 compound, matte tin-plated leads solderable per J-STD-002. Dimensions: 7.75 mm × 6.22 mm × 2.62 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode of internal PN junction | Connected to protected line; reverse-biased during normal operation; conducts during overvoltage |
| Anode (unmarked end) | Cathode of internal PN junction | Typically tied to ground or lower-potential rail; completes clamping path during transient events |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables robust protection against IEC 61000-4-5 Level 4 surges without derating in typical PCB layouts |
| Low clamping voltage (37.5 V @ 40 A) | Keeps protected 24 V logic and gate drivers within absolute maximum ratings during 40 A surge events |
| Glass-passivated chip junction | Ensures stable VBR and low leakage (<1 μA at 23.1 V) across temperature and lifetime |
| Low inductance package | Minimizes voltage overshoot during fast-rising transients (e.g., <100 ns edges from relay coil switching) |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking, reducing manufacturing overhead |
Applications
| Automotive Body Control Module | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protects microcontroller GPIOs and level-shifters connected to external switches and sensors exposed to load-dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground to clamp negative transients and suppress positive spikes. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V interface ICs when subjected to ±100 V/500 ms load-dump pulses per ISO 7637-2. |
Use Scenario: Shields 24 V digital input circuitry from relay contact arcing and solenoid coil flyback in factory automation cabinets. IC Role / Device Role / Timing Role: Primary overvoltage clamp on field-side input traces, positioned upstream of optocoupler or Schmitt-trigger input stage. Use Value: Maintains signal integrity by limiting transient voltage to ≤37.5 V, ensuring reliable detection without false triggering or component stress. |
| Telecom Power Supply Monitoring | Consumer Appliance Motor Driver Interface |
Use Scenario: Safeguards voltage-monitoring ADC inputs and supervisor ICs in AC/DC front-end modules subject to conducted EFT bursts. IC Role / Device Role / Timing Role: Standoff-clamp TVS on 24 V bias rail feeding monitoring circuitry, referenced to isolated ground plane. Use Value: Guarantees measurement accuracy by preventing transient-induced offset shifts or ADC saturation during 4 kV EFT testing (IEC 61000-4-4). |
Use Scenario: Secures gate-drive signal lines between MCU and half-bridge MOSFETs in washing machine motor control boards. IC Role / Device Role / Timing Role: Localized clamping device on low-voltage PWM traces routed near high-current motor phases. Use Value: Eliminates gate oxide stress from coupled inductive noise, extending MOSFET lifetime and avoiding erratic commutation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24A | Lower PPPM (600 W), higher VWM (24 V), same SMC package but smaller die size | Limited to lighter-duty transients; insufficient for IEC 61000-4-5 Level 4 | Select SMBJ24A only for cost-sensitive consumer applications with <20 A expected IPPM |
| SMCJ24A | Same 1500 W rating and SMC package, but VWM = 24 V and VC = 38.9 V at 38.9 A | Nearly identical clamping performance; slightly higher VWM allows tighter margin above 24 V nominal rails | SMCJ24A offers comparable protection with marginally improved standoff; verify layout compatibility due to identical footprint |
Compared with SM15T27A-M3/57T, SMBJ24A provides reduced surge handling for budget-constrained designs, while SMCJ24A delivers functionally equivalent clamping with a 0.9 V higher VWM-making it suitable where 24 V system tolerance permits tighter design margins without compromising reliability.
Availability
SM15T27A-M3/57T is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input stages, and telecom power monitoring systems requiring stable component supply and halogen-free compliance.
Supply support for SM15T27A-M3/57T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, and protection devices with emphasis on reliability and application-specific optimization.
The SM15T Series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure where robustness against lightning and switching surges is critical.
FAQ
What is the clamping voltage of SM15T27A-M3/57T at its rated peak pulse current?
The SM15T27A-M3/57T has a maximum clamping voltage (VC) of 37.5 V at 40 A peak pulse current with a 10/1000 μs waveform. This value is measured under standardized test conditions on 8.0 mm × 8.0 mm copper pads and defines the upper voltage limit imposed on protected circuitry during surge events. The SM15T27A-M3/57T maintains this clamping performance across its specified operating temperature range.
Is SM15T27A-M3/57T AEC-Q101 qualified?
No, SM15T27A-M3/57T is not AEC-Q101 qualified. Its M3 suffix indicates halogen-free, RoHS-compliant commercial-grade construction. AEC-Q101 qualification requires the HM3 suffix (e.g., SM15T27AHM3_A/H). The SM15T27A-M3/57T is intended for industrial and general automotive applications where full automotive qualification is not mandated.
What does the "/57T" in SM15T27A-M3/57T signify?
The "/57T" denotes the preferred packaging configuration: 7-inch diameter plastic tape and reel, with a base quantity of 850 units. This format supports automated SMT placement and is compatible with standard pick-and-place equipment. The SM15T27A-M3/57T uses this delivery mode exclusively for commercial-grade ordering, distinct from 13-inch reels (e.g., /9AT).
How does SM15T27A-M3/57T differ from bidirectional variants like SM15T27CA?
The SM15T27A-M3/57T is unidirectional, with polarity marked by a cathode band, and protects against positive transients relative to ground. In contrast, SM15T27CA is bidirectional, lacks polarity marking, and suppresses transients of either polarity-suitable for AC-coupled or floating signal lines. The SM15T27A-M3/57T cannot replace SM15T27CA in AC applications without circuit redesign.
What is the thermal resistance of SM15T27A-M3/57T, and how does it affect layout?
The SM15T27A-M3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pads per terminal. To maintain safe junction temperatures under sustained power dissipation, PCB layout must adhere to this pad size; reducing pad area increases RθJA and risks thermal runaway. The SM15T27A-M3/57T's thermal performance is validated only under this condition.
SM15T27A-M3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- SM15T, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 23.1V
- Voltage - Breakdown (Min):
- 25.7V
- Voltage - Clamping (Max) @ Ipp:
- 37.5V
- Current - Peak Pulse (10/1000µs):
- 40A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SM15T27A-M3/57T FAQ
1.How can I place an order for SM15T27A-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T27A-M3/57T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SM15T27A-M3/57T reliable?
The price and inventory of SM15T27A-M3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T27A-M3/57T is usually 5 days.
3.What payment methods are accepted for SM15T27A-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T27A-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T27A-M3/57T?
SM15T27A-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T27A-M3/57T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SM15T27A-M3/57T?
For technical support, including SM15T27A-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T27A-M3/57T requirements.
6.How does Aetrix verify that SM15T27A-M3/57T is sourced from the original manufacturer or authorized distributors?
All SM15T27A-M3/57T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SM15T27A-M3/57T meets industry standards.
7.What is the process for return or replacement of SM15T27A-M3/57T?
All SM15T27A-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SM15T27A-M3/57T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SM15T27A-M3/57T part is unused and in its original packaging.
Return procedure for SM15T27A-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T27A-M3/57T Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
